Docs: Replace BetterError with plugin-error reference

Author: contra

docs/writing-a-plugin/recommended-modules.md

@@ -10,7 +10,7 @@ Use [replace-ext](https://github.com/wearefractal/replace-ext)
 
 #### Errors
 
-Use [BetterError](https://github.com/contra/BetterError) when it is finished
+Use [plugin-error](https://github.com/gulpjs/plugin-error)
 
 #### String colors